Vulnerability identifier: #VU12522

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-2611

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
389-ds-base
Server applications / Directory software, identity management

Vendor: 389 Directory Server Project

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists due to improper handling of long search filters with characters that need to be escaped. A remote attacker can submit a specially crafted Lightweight Directory Access Protocol (LDAP) request, trigger buffer overflow and cause the ns-slapd process to crash. 

Mitigation
Update to versions versions 1.3.6.15, 1.3.8.1 and 1.4.0.9.

Vulnerable software versions

389-ds-base: 1.4.0 - 1.4.0.8, 1.3.0 - 1.3.0.8, 1.3.1.0 - 1.3.1.19, 1.3.3.1, 1.3.4, 1.3.5.1 - 1.3.5.19, 1.3.6 - 1.3.6.14, 1.3.7 - 1.3.7.10, 1.3.8, 1.2.11.1 - 1.2.11.23, 1.2.10.0 - 1.2.10.a8, 1.2.9.0 - 1.2.9.9

---

External links
http://pagure.io/389-ds-base/issue/49661

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.